Abrading wheel forming device



2 Sheets-Sheet 1 July 27, 1937; e. s. GOULD ABRADING WHEEL FORMING DEVICE Filed July 22, 1935 July 27, 1937. G. s. GOULD ABRADING WHEEL FORMING DEVICE Filed July 22, v1955 ZSheets-Sheet 2 Patented July 27, 1937 UNW'E the Gardner S. Gould, Lunenburg, Mass.

Application July 22,

1 Claim.

This invention relates to a device for contouring an abrasive wheel.

The principal objects of the invention are to provide means for accomplishing this result which will avoid the three different settings of a diamond to shape the two angular sides and the bottom, for example, of a grinding wheel having such a shape; to provide a construction in which the truing wheel is provided with radial cutting blades, spaced apart around its circumference, formed in the exact reverse of the shape desired on an abrading wheel, so that by rotating both wheels the desired cutting and forming action can be provided; to provide means for rotating both wheels on parallel axes and causing a relative reciprocating motion of the wheels, and to provide a cutting wheel of the properties above mentioned.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is an end view of a part of a machine showing a preferred form of the cutting wheel in elevation;

Fig. 2 is a sectional view on the line 2--2 of Fig. 1 showing the abrading wheel in contact with the cutting wheel;

Fig. 3 is a perspective view of a blade of the cutting wheel, shaped to provide the contour shown in Fig. 2 for the abrading wheel, and

Fig. 4 is a View of the machine taken in the same direction as Fig. 1 to illustrate the motions thereof.

I-Ieretofore abrading wheels having a contoured shape have been trued by a diamond tool which, for a wheel having two angular sides and a bottom, requires three different settings of the diamond and each operation requires three or four passes of the diamond point across the wheel. This invention profiles or forms the periphery of the abrading wheel to shapes which have been done before by such a diamond point by the necessary use of swivels, slides or a pantograph arrangement. c

In accordance with the present invention an abrading wheel it is shown of a shape requiring a rather complicated action on the part of the diamond point. This grinding wheel, of course, is mounted on a shaft l l and in the present illustration is rotated, as for example, by a belt l4 from any desired source of power.

1935, Serial No. 32,661

In this case the metallic cutting wheel i5 is formed with a series of abutments it, each having a radial edge H and preferably constituting a regularly evenly spaced series around its circumference. These surfaces ll, together with tangential surfaces l8, constitute seats. A series of flat cutting blades iii are cemented into these seats so as to project radially from the center of the cutting wheel. These blades are formed of a material, metal or alloy harder than the abrading wheel, such as tantalum carbide, tungsten carbide or the like. The outside surface of each blade is shaped to the exact reverse of the desired shape of the abrading wheel ill.

The shaft 2t of the cutting wheel is mounted in a frame 2i which is carried by a traversing table 22. The shaft 2t! is rotated by any desired means, as for example, a pulley and belt 23, the motor 26 for which is carried by the table 22 and moves with it. This table 22 is provided with a rack 24 which is operated bya pinion 25 in turn rotated by a motor or other source of power, not shown..

It will be seen, therefore, that the two wheels rotating on parallel shafts, can be put into rotation at high speeds and the table 22 traversed back and forth under the wheel it as it rotates.

This truin-g device will produce the desired contour on the abrading or grinding wheel it and no setting of the parts, or other motion thereof,

is required during the entire truing of a single wheel. The blades on the cutting wheel have a chance to cool between operations both on account of the rotation of the wheel and the traverse of the table. The cutting is exact and distinct and the operation requires very much less time than has been the case heretofore.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claim, but what I claim is:

A wheel for forming the surface of an abrading wheel havinga circular concentric series of projecting abutments substantially radial on one side, the opposite side gradually thickening toward the base and hard blades cemented to the radial surfaces of said abutments in radial position and at a wide circumferential distance apart, said blades having a central convex configuration and sides slanting outwardly therefrom.

GARDNER S. GOULD. 

